oscillator

a technology of oscillator and oscillator, which is applied in the direction of oscillator generator, electrical apparatus, etc., can solve the problems that the oscillator cannot follow the ultrahigh-speed modulation, and the negative differential resistance element cannot be modulated at ultrahigh speed

Active Publication Date: 2012-03-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The present invention has been made in view of the problems described above, and the present invention provides an oscillator capable of modulating a negative differential resistance element at ultrahigh speed.

Problems solved by technology

However, in the oscillators according to the related art, even if a control bias is modulated at ultrahigh speed, the oscillators may not follow the ultrahigh-speed modulation.
Therefore, negative differential resistance elements are not allowed to be modulated at ultrahigh speed in the oscillators according to the related art.

Method used

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first embodiment

[0030]An oscillator according to a first embodiment will be described with reference to FIG. 1. FIG. 1 is a diagram illustrating a circuit configuration of the oscillator according to this embodiment.

[0031]The oscillator of this embodiment which includes a negative differential resistance element 101 and a resonator 102 which prescribes oscillation frequencies of electromagnetic waves oscillates electromagnetic waves in a frequency band in a range from a millimeter waveband to a terahertz waveband (equal to or larger than 30 GHz and equal to or smaller than 30 THz). The arrangement relationship between the negative differential resistance element 101 and the resonator 102 shown in FIG. 1 may be employed, and alternatively, the arrangement relationship in which positions of the negative differential resistance element 101 and the resonator 102 are replaced by each other may be employed. Furthermore, an inductance and a capacitance of the resonator 102 include an inductance component ...

second embodiment

[0035]An electromagnetic wave generation element according to a second embodiment will be described with reference to FIG. 3. FIG. 3 is a diagram illustrating a circuit configuration of an oscillator of this embodiment serving as a modification of the first embodiment.

[0036]This embodiment is specifically different from the first embodiment in that the voltage modulation unit 103 is configured by a resonator 203 having a modulation frequency of ωm. Other configurations are the same as those of the first embodiment. That is, the oscillator includes a negative differential resistance element 201, a resonator 202 having an oscillation frequency of ω0, a stabilizing circuit including a resistor 204, and a bias circuit including a power source 205 and a line 106. A resonator 203 having a modulation frequency of ωm may be a distributed constant resonator. In this case, the negative differential resistance element 201 oscillates the oscillation frequency ω0 of the first resonator 202 and t...

third embodiment

[0040]An electromagnetic wave generation element according to a third embodiment will be described with reference to FIG. 5. FIG. 5 is a diagram illustrating a circuit configuration of an oscillator of this embodiment serving as a modification of the first embodiment.

[0041]This embodiment is specifically different from the first embodiment in that the voltage modulation unit 103 is configured by photocoupler which transmit and receive a modulation frequency ωm. Use of the photocoupler enables a voltage modulation unit to be electrically isolated and a modulation frequency to be variable. Other configurations are the same as those of the first embodiment. That is, the oscillator includes a negative differential resistance element 501, a resonator 502 having an oscillation frequency of ω0, a stabilizing circuit (resistor) 504, and a bias circuit including a power source 505 and an inductance 506. Since a transmission optical element 5032 and a reception optical element 5031 are electr...

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Abstract

An oscillator which oscillates electromagnetic waves includes a negative differential resistance element, a resonator configured to prescribe oscillation frequencies of the electromagnetic waves, a voltage modulation unit configured to modulate the negative differential resistance element, a stabilizing circuit configured to suppress parasitic oscillation, and a bias circuit, including a power supply and a line, used to control an operating point voltage of the negative differential resistance element. The voltage modulation unit is connected to the bias circuit through the stabilizing circuit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to oscillators used as oscillation mixer apparatuses including negative differential resistance elements for generating electromagnetic waves. The present invention particularly relates to an oscillator which oscillates electromagnetic waves in a frequency band within a frequency region from a millimeter waveband to terahertz waveband (equal to or larger than 30 GHz to equal to or smaller than 30 THz).[0003]2. Description of the Related Art[0004]As has been broadly recognized, a negative differential resistance element is useful in an application field of oscillators which generate electromagnetic waves when being used with a resonator. The negative differential resistance element generates electromagnetic waves (hereinafter simply referred to as terahertz waves) including at least a number of frequency components in the frequency band in the range from the millimeter waveband to the terahe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03B7/00
CPCH03B7/02H03B7/08H03B17/00
Inventor SEKIGUCHI, RYOTA
Owner CANON KK
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